struct Foo{
	int[] i;
}

bool func(){
	Foo foo;
	foo.i ~= 1;
	foo.i ~= 2;//Compile fails on this line.
	return true;
}

When I compiled this source code, compile of dmd v2.054 built from trunk failed.

Error: foo.i ~= 2 cannot be evaluated at compile time

This may shows that operator ~= or array in CTFE has wrong behavior.